F23⁡(a,b,c12⁢(a+b+1),2⁢c;1)=Γ⁡(12)⁢Γ⁡(c+12)⁢Γ⁡(12⁢(a+b+1))⁢Γ⁡(c+12⁢(1-a-b))Γ⁡(12⁢(a+1))⁢Γ⁡(12⁢(b+1))⁢Γ⁡(c+12⁢(1-a))⁢Γ⁡(c+12⁢(1-b)),